<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter="20">
        <!-- 搜索框区域 -->
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
            <!-- 搜索按钮 -->
            <el-button slot="append" icon="el-icon-search" @click="searchGoods"></el-button>
          </el-input>
        </el-col>
        <!-- 添加商品按钮 -->
        <el-col :span="4">
          <el-button type="primary" @click="goToAdd">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- 商品列表区域 -->
      <el-table :data="goodsList" style="width: 100%" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column prop="goods_name" label="商品名称" width="600px"> </el-table-column>
        <el-table-column prop="goods_price" label="商品价格"> </el-table-column>
        <el-table-column prop="goods_weight" label="商品重量"> </el-table-column>
        <el-table-column label="创建时间">
          <template #default="scope">
            {{ scope.row.add_time | dateFormat }}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="180">
          <template #default="scope">
            <!-- 商品编辑按钮 -->
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <!-- 商品删除按钮 -->
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteGoods(scope.row.goods_id)">删除</el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[10, 50, 200, 500]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  created () {
    this.getGoodsList()
  },
  data () {
    return {
      /* 商品对象列表 */
      goodsList: [],
      /* 商品列表请求时的查询参数 */
      queryInfo: {
        /* 查询的相关参数 */
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      /* 商品总数 */
      total: 0
    }
  },
  methods: {
    /* 获取商品列表 */
    async getGoodsList () {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        this.$message.error('获取商品列表失败')
      }
      this.goodsList = res.data.goods
      this.total = res.data.total
    },
    /* pagesize改变时 */
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    /* pagenum改变时 */
    handleCurrentChange (newNum) {
      this.queryInfo.pagenum = newNum
      this.getGoodsList()
    },
    /* 监听点击搜索按钮时事件 */
    searchGoods () {
      this.getGoodsList()
    },
    /* 监听删除按钮被点击时事件 */
    async deleteGoods (id) {
      this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async () => {
        const { data: res } = await this.$http.delete('goods/' + id)
        if (res.meta.status !== 200) {
          this.$message.error('删除商品失败')
        }
        this.$message.success('删除商品成功')
        this.getGoodsList()
      }).catch(() => {
        this.$message.info('已取消删除商品')
      })
    },
    /* 监听添加商品按钮事件 */
    goToAdd () {
      this.$router.push('/goods/add')
    }
  }
}
</script>

<style lang="less" scoped>
.el-breadcrumb {
  font-size: 12px;
  margin-bottom: 20px;
}
.el-card {
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15) !important;
}
</style>
